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FW: Help - HTTP_URL_POST_XML recvresp hanging
I did look a little in CHGTCPA... and my tcpkeepalv was set to (5)....
The only number that was large/stuck out as maybe a long wait was 'Network file cache' - 'Cached file timeout'....
This was set to over 5 hours...
Thanks,
Paul Kenosky
-----Original Message-----
From: ftpapi-bounces@xxxxxxxxxxxxxxxxxxxxxx [mailto:ftpapi-bounces@xxxxxxxxxxxxxxxxxxxxxx] On Behalf Of Paul Roy
Sent: Saturday, January 09, 2016 11:39 AM
To: HTTPAPI and FTPAPI Projects
Subject: Re: Help - HTTP_URL_POST_XML recvresp hanging
I probably did not explain it correctly, but the symptoms were the same :
application locked.. staying in wait status... we had to cancel the job...
I observed that after 2 hours, the connection was dropped, and an error was sent to the program... In my situation, changing the TCP keep alive value did solve the issue... (error sent to the application after 1
minute)
My understanding/guess was that the target application was no longer connected but that the disconnect packet was lost/missing. So the connection was still existing/locked in the TCP stack level and the local application was still in wait status...
From what I remember, after the time specified in TCPkeep alive, the TCP stack sends a RR(?) packet and if there is no answer the communication is dropped..
Of course, I could be confusing different things ,my knowledge of TCP/IP is very superficial and very old. More over, I have only used HTTPAPI (great tool! thank you!) and never dig into it... so sorry if I was misleading.
Paul
From: Scott Klement <sk@xxxxxxxxxxxxxxxx>
To: HTTPAPI and FTPAPI Projects <ftpapi@xxxxxxxxxxxxxxxxxxxxxx>
Date: 09/01/2016 08:27
Subject: Re: Help - HTTP_URL_POST_XML recvresp hanging
Sent by: ftpapi-bounces@xxxxxxxxxxxxxxxxxxxxxx
Paul Roy,
I can't see what this has to do with the error he's describing? I wonder
if you're confusing two different things?
With Java applications (and only with Java... I suspect this is a bug
somewhere deep in the JVM) I've seen issues where TCP connections will
sporadically disconnect, and setting the keep-alive value (i.e. the
CHGTCPA option you mention) to a small value works around this bug.
But that's not at all related to what Paul Kenosky is describing. He's
saying that his session never ends or times out -- so pretty much the
opposite. It seems unlikely that this keep-alive value would solve
that, unless there's something that I'm not thinking of?
-SK
On 1/8/2016 5:32 AM, Paul Roy wrote:
> Hi,
> this looks to me like a communication error... either the remote
did
> not receive your data or you did not receive the response...
> I had the same kind of issues (not with HTTPAPI but a Java pgm) that
> was solved by shortening the tcp keep alive value (if i remember
> correctly, the time that the TCP stack waits before closing the
socket
> . if there is no traffic)
> the default value is 2 hours and can be changed with CHGTCPA
> TCPKEEPALV(1) to set 1 minute... you can also change the option of
the
> socket wit set_sock_options()... but I do not know if te option is
> available in HTTPAPI
> then you should add some logic in your program to try again...
>
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